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Maniphest T56207

Blender 2.8 - Principled hair shader is not working on shade more or render mode (eevee)
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Description

System Information
Windows x64, i7 4930K, Titan X graphic card

Blender Version
Broken: Blender 2.8 0f449541d2e
Worked: Blender 2.8 (July 2018)

Short description of error
When principled hair shader is applied to a particle (hair) system, the results are not shown on the viewport. Only a black constant color is represented. Was previously working on shade and render modes (eevee).

Exact steps for others to reproduce the error

  1. In Blender 2.8 open any hair scence from 2.79b, groomed on any mesh with principled hair shader.
  2. On Blender 2.8 the viewport doesn´t represent the principled hair shader on shade mode or render mode (eevee).

Related Objects

Event Timeline

David (activemotionpictures) created this task.Aug 2 2018, 5:51 AM
Bastien Montagne (mont29) lowered the priority of this task from 90 to 30.Aug 2 2018, 5:28 PM
Bastien Montagne (mont29) added a subscriber: Bastien Montagne (mont29).

Please follow our submission template and guidelines, also read these tips about bug reports, and make a complete, valid bug report, with required info, precise description of the issue (only ONE issue per report!), precise steps to reproduce it, small and simple .blend and/or other files to do so if needed, etc.

David (activemotionpictures) added a comment.Aug 2 2018, 9:58 PM

I provided a screen capture. The .blend file is 7mb. I´d gladly post it if you need it.
How would you know I appended other objects (hair) in the scene if the outline representation is broken? (https://developer.blender.org/T56203) I already reported these errors.
I don´t understand why this is marked as incomplete priority? What am I missing that I should include?
Thanks.

s12a (s12a) added a subscriber: s12a (s12a).EditedAug 5 2018, 9:58 PM

The Principled Hair BSDF for now is only compatible with Cycles. I don't think it is meant to work with EEVEE yet.

https://www.youtube.com/watch?v=xNlGsmZ6osk

Landed in both master and Blender 2.8. Will it come to EEVEE? Eventually parts of it can be made compatible but it won't look the same as this is quite raytracing heavy

The standard Principled Shader does work for hair. Perhaps this is what previously worked in your case?

Bastien Montagne (mont29) changed the task status from Unknown Status to Invalid.Aug 12 2018, 4:12 PM
Bastien Montagne (mont29) claimed this task.

More than a week without reply or activity. Due to the policy of the tracker archiving for until required info/data are provided.

David (activemotionpictures) added a comment.Aug 12 2018, 11:03 PM

Here´s the link for a simple scene. Hair BSDF is not rendering on EEVEE: http://pasteall.org/blend/index.php?id=50138

Sebastian Ferreyra (Saabi) added a subscriber: Sebastian Ferreyra (Saabi).Oct 9 2018, 11:46 PM
Jonathan (Gravedrinker) added a subscriber: Jonathan (Gravedrinker).Dec 5 2018, 8:50 AM

I'm getting the same thing. Works fine on cycles, shows up black in Eevee.

Brecht Van Lommel (brecht) added a subscriber: Brecht Van Lommel (brecht).Dec 5 2018, 9:31 AM

This shader is not supported in EEVEE yet.

Mircea Kitsune (mirceakitsune) added a subscriber: Mircea Kitsune (mirceakitsune).Apr 30 2019, 3:10 PM
Luke Graybill (Killarny) added a subscriber: Luke Graybill (Killarny).May 13 2019, 7:55 AM
Garry R. Osgood (grosgood) mentioned this in T71255: 2.82 Particle Hair not showing as expected in Cycles viewport/rendering due to optix rendering.Nov 1 2019, 1:33 PM